Circuit-controlling device.



F. J. WEST & H. W. DARBY.

CIRCUIT CONTROLLING DEVICE.

APPLICATION FILED JULY 8, 1912.

1,066,965. Patented July 8, 1913.

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P. J. WEST & H. W. DARBY.

CIRCUIT CONTROLLING DEVICE.

APPLICATION FILED JULY 8,1912.

1,066,965. PatentedvJuly 8,1913.

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'UNTTED @TTES PATENT QFFTCE.

FREDEICK JAMES TVEST AND HARRY WILLIAM DARBY, OF WINNIPEG, MANITOBA, CANADA.

CIRCUIT-CONTROLLING DEVICE.

Specification of Letters Patent.

Application filed July 8, 1912.

.fa'tentml July 8, .1913.

Serial No. 708,240.

To a 207mm 77/ may concern Be it known that we, Fnnnnrcin JAMES \Vns'r and llama lVILn'raM Danny, of the city of Winnipeg, in the Province of Manitoba, Canada, have invented certain new and useful Tinproveniei'its in (lircuit-( ontrolling Devices, of which the following is the specitication.

The invention relates to a device for controlling the making and breaking of an electrical circuit the present apparatus being particularly designed for use with electrical riveters.

The object of the invention is to provide a. simple and elticient controlling device which will allow of a con'uuou central control for a number of distant instruments or tools such as riveters.

\Vith the above object in view the invention consists essentially in the arrangement and construction of parts hereinailtei. more nirticularly described and later pointed out :in the appended claims.

Figure 1 is a plan view of the complete :uaparatus. Fig. 2 represents a vertical sectional view through the well and driven shaftthe contact pieces mounted on the shaft being shown in side elevation. Fig. 3 represents a horizontal sectional view through the driven shaft, the section being taken in the plane denoted by the line XX Fig. 9.. Fig. 4. represents a detailed side view of the driven shaft, the contact tubes and the contact pieces carried thereby. Fig. represents a vertical sectional view through the driven shaft the section being taken in the plane denoted by the line Q-Y Fig. 1, and looking in the direction indicated by the arrow n.

In the drawings lilce characters of reference indicate corres 'ionding parts in each figure.

1 and 2 represent bearings formed in the upper ends of suitable insulated standards 3 and 1 which bearings receive rotatably a driven shaft 5 which shaft is connected through a drive belt (3 in the usual way with the drive shaft 7 of an electric motor 8. The feed wires 9 and 10 for the motor pass to binding posts 11 and 19 connected through fuse plugs 13 and 14; with the line wires 15 and. 16.

A knife switch 17 of the usual form is inserted in the line.

Centrally on the shaft we have mounted an insulating plate 18 which provides eX- tending wings 19 and 20 carrying each on their opposite faces pairs of contact plates 21 and 21., and 29 and 22', the plates of each pair being connected electrically by suitable rivets 2Z3 passing through the wings. The insulating plate is held perinanently on the shaft by lock nuts 24: and 25 in'micdialely adjoining which we have placed insulating washers 20 and 97.

28 and 29 are insulating tubes slipped on the shaft 5 and fitting tightly on the same, which tubes have their inner ends butted up against. the washers 2e and 27 and their outer ends butted up against insulating washers 30 and 31 located against the inner faces of the standards 1 and 9.

Brass tubes 32 and 333 are slipped tightly over the insulating tubes 28 and Q5) and have their inner and outer ends butting against the same washers as the tubes 28 and 29.

The contact plates 21. and 22 carry braekets 53 i and 35 having their outer ends riveted. to the respective plates and their inner ends lirmly fastened .in any suitable way to the tubes 32 and 33 respectively.

This arrangement is such that the pair of plates 22 and 92 is electrically connected with the tube 133 and the pair of plates 21 and 21' is electrimilly connected with the tube 32, the plates and tubes 32 and 33 being insulated from the shaft 5. The insulating plate 18 and adjoining parts are housed within a well 36 having the walls thereof formed from any suitable insulating material.

The well contains a body of mercury 37 having a liquid such as oil 38 poured on the top thereof. The pairs of contact plates 21 and 21, and 22 and 22 are adapted to dip into the mercury as the shaft rotates and thereby alternately connect the tubes 39 and ill) with the mercury.

The oil is utilized to avoid s1 arl ing as the contacts pass out of the mercury.

A wire 39 makes electrical contact with the mercury and passes to a binding post 40 connected through a fuse plug {l-l, electrically with the line wires 1.6.

The standards 3 and t carry insulating supports ll. and 4-2 on which we have mounted brushes 13 and it bearing on the tubes 32 and 33 respectively.

A, B and C are binding posts located in any suitable place adjoining the apparatus and a is a wire connecting the binding post A with the :brush 43.

b is a wire connecting the binding post B electrically with a binding post 45 connected through a fuse plug 4L6'with the line wire 15 and 0 bindingpost; G with-the brush 4%.

A carbon or other such like resistance 47 is shunted across or inserted between the binding posts A and B and a similar carbonor such like resistances? is shunted acrossor inserted between the binding posts B' andC;

Lead wires A, Band C are connected with therespective binding posts A, B and C which lead wires pass to a tool such as a riveter.

Inorder to make the operation of the apparatus better understood it is here explained that the riveter or such like instrument controlled-by this apparatus considered as supplied with sets of magnetic coils which have to be alternately energized.

One' set ofthe-magnetic coils in actual practicewould be inserted between the wires A and B while the other set would be inserted between the wires B and G. Imagining such a tool connected to'the wires A, B, and G" which it will be understood would need tobe long enough to reach to the place where-the tool-is to be used, it will readily be-seen-that upon the shaft 5 being-rotated bytheshaftTthe circuit will be alternately opened and closed through the wires a, b and '0 1) b being considered as the common positive side of the line, these latter wiresin each instance communicating with the common negative wire 39 directly connectedwith-the negative line wire 16.

The resistances 4:7 and 4L7 prevent sparking-when the contact plates 21, 21 and 22 andi22" dip out of or into the'niercury. What we claimas our invention is 1. A circuit controlling device comprising air insulated mercury well, a wire leading from the well, and a rotatably mounted and is a wire connecting the" suitably insulated shaft, means for rotating the shaft, an insulating. plate extending,-

the -mercury when the shaft is rotated, in-

sulatingtubes mounted 011 the shaft at the opposite sides of the insulating plate and extending beyond the well, contact tubes containing the insulating tubes and extending beyond the well and electrically connected to said contact plates, suitably supported'insulated brushes bearing'on therespective contact tubes and wires passing from the brushes, as and for the purpose specified.

2. A circuit controlling device comprising a suitably insulated mercury well, a plurality of independent binding posts, supply wires, one of saidwires-leading to the mercury well and the other of the'wires leading to one ofthe binding posts, a rota tably mounted suitably means for rotating the shaft, an insulating plate rotatable with the shaft and contained within the well, pairs of contact plates carried by the insulating plate and designed to successively dip into the mercury, metallic tubes carried by the shaft and insulated therefrom, said tubes extending beyond the well on either side of the insulating plate,- bars connecting therespective pairs of contact plates with the respective tubes, suitably mounted and insulatedzbrushes bearing continuously on the respective tubes and wires leading from the brushes to the other of the binding posts, as and for the-purpose specified.

Signed at WVinnipeg'this 26 day of June, 1912.

FREDRIGK JAMES W EST. HARRY lVILLIAM DARBY.

In the presence of- G. S.- Roxnunerr, R. FOSTER.

Gopiesof this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

insulated shaft, i 

